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sbusreg.h revision 1.3 
      1 /*	$NetBSD: sbusreg.h,v 1.3 1997/09/14 19:17:25 pk Exp $ */
      2 
      3 /*
      4  * Copyright (c) 1992, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * This software was developed by the Computer Systems Engineering group
      8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
      9  * contributed to Berkeley.
     10  *
     11  * All advertising materials mentioning features or use of this software
     12  * must display the following acknowledgement:
     13  *	This product includes software developed by the University of
     14  *	California, Lawrence Berkeley Laboratory.
     15  *
     16  * Redistribution and use in source and binary forms, with or without
     17  * modification, are permitted provided that the following conditions
     18  * are met:
     19  * 1. Redistributions of source code must retain the above copyright
     20  *    notice, this list of conditions and the following disclaimer.
     21  * 2. Redistributions in binary form must reproduce the above copyright
     22  *    notice, this list of conditions and the following disclaimer in the
     23  *    documentation and/or other materials provided with the distribution.
     24  * 3. All advertising materials mentioning features or use of this software
     25  *    must display the following acknowledgement:
     26  *	This product includes software developed by the University of
     27  *	California, Berkeley and its contributors.
     28  * 4. Neither the name of the University nor the names of its contributors
     29  *    may be used to endorse or promote products derived from this software
     30  *    without specific prior written permission.
     31  *
     32  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     33  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     34  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     35  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     36  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     37  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     38  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     39  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     40  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     41  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     42  * SUCH DAMAGE.
     43  *
     44  *	@(#)sbusreg.h	8.1 (Berkeley) 6/11/93
     45  */
     46 
     47 /*
     48  * Sun-4c S-bus definitions.  (Should be made generic!)
     49  *
     50  * Sbus slot 0 is not a separate slot; it talks to the onboard I/O devices.
     51  * It is, however, addressed just like any `real' Sbus.
     52  *
     53  * Sbus device addresses are obtained from the FORTH PROMs.  They come
     54  * in `absolute' and `relative' address flavors, so we have to handle both.
     55  * Relative addresses do *not* include the slot number.
     56  */
     57 #define	SBUS_BASE		0xf8000000
     58 #define	SBUS_ADDR(slot, off)	(SBUS_BASE + ((slot) << 25) + (off))
     59 #define	SBUS_ABS(a)		((unsigned)(a) >= SBUS_BASE)
     60 #define	SBUS_ABS_TO_SLOT(a)	(((a) - SBUS_BASE) >> 25)
     61 #define	SBUS_ABS_TO_OFFSET(a)	(((a) - SBUS_BASE) & 0x1ffffff)
     62 
     63 struct sbusreg {
     64 	u_int32_t	sbus_afsr;	/* M-to-S Asynchronous Fault Status */
     65 	u_int32_t	sbus_afar;	/* M-to-S Asynchronous Fault Address */
     66 	u_int32_t	sbus_arbiter;	/* Arbiter Enable  */
     67 	u_int32_t	sbus_reserved1;
     68 
     69 #define NSBUSCFG	20
     70 	/* Actual number dependent on machine model */
     71 	u_int32_t	sbus_sbuscfg[NSBUSCFG];	/* Sbus configuration control */
     72 };
     73